Seiko Cal. 5681 - 377

This Kinetic model from 1967 features a 42mm Hardlex-Coated Steel case. Powered by the 5681 caliber with 30j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-215521b138f2]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1967

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